lack of swing arm grease fitting nipple on '74 mk11a commando

motodoc

motodoc

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Do late model Mk11a 's have a sealed system like the mk111's ? My '74 has no zirc fitting, just an end cap with through bolt. But it does have the top side check bolt and hole. Should I tap a hole and insert zirc fitting or just leave it as is. 17 K original miles on bike. No issues with slop. Thank you for any advice.
 
motodoc said:
Do late model Mk11a 's have a sealed system like the mk111's ? My '74 has no zirc fitting, just an end cap with through bolt. But it does have the top side check bolt and hole.
Click to expand...

Yes, although the sealed assembly had Welch plugs, not end caps and a through-bolt. If it has a through-bolt end cap then it should have a hole for the oil nipple so possibly a previous owner's modification, perhaps an oil filler plug, not a through-bolt?

motodoc said:
Should I tap a hole and insert zirc fitting or just leave it as is.
Click to expand...

Or you can remove the central bolt and add oil (not grease) there.
 
Last edited:
L.A.B. said:
Yes, although the sealed assembly had Welch plugs, not end caps and a through-bolt. If it has a through-bolt end cap then it should have a hole for the oil nipple so possibly a previous owner's modification, perhaps an oil filler plug, not a through-bolt?



Or you can remove the central bolt and add oil (not grease) there.
Click to expand...
Exactly, it is NOT a grease fitting. 140 weight oil.
 
Walridge Motors just sold me a small bottle of 140 W. Swingarm oil . Now to figure out how to get it in , with the Welsh plug caps . Have a new Welsh cap for the R. side , which will be opened up with the bike leaning to the left side .. Sealed for life apparently . Not on my watch !
 
This has been covered many, many times.
Search is your friend.
I attached a small hose on the RH side, ( I know, the horrors, I drilled a hole in a readily available $3 part 🤣 ) hook it up to a funnel once a year. Gravity still works.
 
I have the Welch plugs "sealed system" in my 74 mk2. There's no play that I can detect by trying to move the rear wheel. 17,000 miles on the clock and the swing arm has never been serviced. I am going in to replace the horn so I would like to add some oil to the swing arm thru the bolt hole as a preventive measure. I have the 140 oil and a syringe. Question - how much would be a good amount of oil to put in there? Also is it a long process like having to wait for oil to absorb then add more etc?
 
Saber said:
I have the Welch plugs "sealed system" in my 74 mk2. There's no play that I can detect by trying to move the rear wheel. 17,000 miles on the clock and the swing arm has never been serviced. I am going in to replace the horn so I would like to add some oil to the swing arm thru the bolt hole as a preventive measure. I have the 140 oil and a syringe. Question - how much would be a good amount of oil to put in there? Also is it a long process like having to wait for oil to absorb then add more etc?
Click to expand...
Fill it.

It will leak out.

Bushings & felts will be dampened.
 
I took off the lubrication fitting, filled an oil can with 140W, pressed the flexible nozzle of the oil can against the
hole and pumped oil in until it had hydraulic lock and was full, then replaced the fitting.

After that, it spends a month or two dripping out, but I know it has done its job!

Dennis
 
I use this for the swingarm pivot and the speedometer drive mechanism. It's oil that doesn't harden up like grease, and flows when it gets warm. It's good for bushings, and a few other things. It doesn't drip like all the oils I've used in the swingarm. I think it says on the site that it's roughly 680wt oil.

What is Jewell Amber Oil??

Genuine Rocker Box Grease: Jewell Amber Oil
www.jewellamberoil.com

(Jim Comstock suggested it for something that I forget exactly what, but I use it where appropriate)
 


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